Pump recommendation!

HI guys,

I have built an Aero system similar to the 6"PVC one in the growfaq only on a smaller scale for 4 larger plants

my issue is pumps, I've tried 3 different ones and cant seem to get it right, Aquarium pumps are straight out as they cant handle back pressure and the Pondmate PM700p doesn't provide enough volume and so at the moment the spray heads are mounted inside the netpots at the side spraying weakly which I obviously dont want to keep like that.

any recommendations around the $30-$70 mark.

i am pretty sure you should get a two input pump, thats just what i have been hearing on the forums lately. sorry if i couldn't be of any help to you.